Dangers from color-blindness in railroad employés and pilots
By: by B. Joy Jeffries ...
Contributors: Massachusetts. State Board of Health.
Publisher: Rand, Avery, & Co. ...
Published: 1878
Place of publication: Boston
Language: eng
Number of pages: 40
Subjects: Color blindness.; Railroads -- Employees.; Locomotive engineers.; Switchmen.; Pilots and pilotage.
Other titles: Dangers arising from color-blindness.
Notes: Bibliography: p. 34-40.
Cover title.
Half-title and caption title:  Dangers arising from color-blindness.
At head of title:  From the ninth annual report of the State Board of Health.